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cause of abortion in first trimester

Drahomira Springer, Jan Jiskra, Zdenka Limanova, Tomas Zima, Eliska Potlukova
Thyroid hormones are crucial for the growth and maturation of many target tissues, especially the brain and skeleton. During critical periods in the first trimester of pregnancy, maternal thyroxine is essential for fetal development as it supplies thyroid hormone-dependent tissues. The ontogeny of mature thyroid function involves organogenesis, and maturation of the hypothalamus, pituitary and the thyroid gland; and it is almost complete by the 12th-14th gestational week. In case of maternal hypothyroidism, substitution with levothyroxine must be started in early pregnancy...
January 19, 2017: Critical Reviews in Clinical Laboratory Sciences
Gabriel D Shapiro, Jean R Séguin, Gina Muckle, Patricia Monnier, William D Fraser
INTRODUCTION: Pregnancy anxiety is an important psychosocial risk factor that may be more strongly associated with adverse birth outcomes than other measures of stress. Better understanding of the upstream predictors and causes of pregnancy anxiety could help to identify high-risk women for adverse maternal and infant outcomes. The objective of the present study was to measure the associations between five past pregnancy outcomes (live preterm birth (PTB), live term birth, miscarriage at <20 weeks, stillbirth at ≥20 weeks, and elective abortion) and pregnancy anxiety at three trimesters in a subsequent pregnancy...
January 12, 2017: Journal of Psychosomatic Obstetrics and Gynaecology
Amir Abdoli, Abdolhossein Dalimi, Haleh Soltanghoraee, Fatemeh Ghaffarifar
BACKGROUND: Congenital toxoplasmosis is an important cause of spontaneous abortion worldwide. However, there is limited information on detection and genotypic characterization of Toxoplasma gondii (T. gondii) in women with recurrent spontaneous abortion (RSA). The aim of this study is the molecular detection and genotypic characterization of T. gondii in formalin-fixed, paraffin-embedded fetoplacental tissues (FFPTs) of women with RSA that have referred to the Avicenna Research Institute in Tehran, Iran...
January 2017: International Journal of Fertility & Sterility
Xianglong Xu, Yunshuang Rao, Sha Deng, Sheng Liu, Jeff J Guo, Manoj Sharma, Yong Zhao
BACKGROUND: Smoking during pregnancy is related to many adverse outcomes on infants. Smoking during pregnancy can cause abortion, premature birth, stillbirth, increased sudden infant death risk, and low birthweight. The aim of this study was to probe the differences in smoking among pregnant women with diverse characteristics. METHODS: In this cross-sectional study, 2345 pregnant women aged 18 years and older were surveyed in person by investigators from June 1, to Aug 31, 2015, from 16 hospitals in five provinces of Mainland China (Chongqing, Chengdu, Zunyi, Liaocheng, and Tianjin)...
October 2016: Lancet
Oskari Heikinheimo, Elina Pohjoranta, Elena Toffol, Satu Suhonen, Timo Partonen
No abstract text is available yet for this article.
December 7, 2016: Acta Obstetricia et Gynecologica Scandinavica
Tonghua Wu, Biao Yin, Yuanchang Zhu, Guangui Li, Lijun Ye, Chunmei Chen, Yong Zeng, Desheng Liang
BACKGROUND: Spontaneous abortion (SA) is the most common complication of pregnancy, and chromosome aberrations are the principal cause of the first trimester abortuses in natural conception (NC) The increasing use of assisted reproductive technology (ART) has raised concern about chromosome abnormalities in ART-initiated pregnancies. Up to date, the literature on the risk of aneuploidy in failed pregnancies among various ART factors remain limited and inconclusive. This study aimed to explore the genetic etiology of pregnancy loss conceived from varying ART procedures...
2016: Molecular Cytogenetics
Roger A Levy, Guilherme R de Jesús, Nilson R de Jesús, Evandro M Klumb
The crucial issue for a better pregnancy outcome in women with autoimmune rheumatic diseases is appropriate planning, with counseling of the ideal timing and treatment adaptation. Drugs used to treat rheumatic diseases may interfere with fertility or increase the risk of miscarriages and congenital abnormalities. MTX use post-conception is clearly linked to abortions as well as major birth defects, so it should be stopped 3months before conception. Leflunomide causes abnormalities in animals even in low doses...
October 2016: Autoimmunity Reviews
Mohammad Miryounesi, Mehdi Diantpour, Elahe Motevaseli, Soudeh Ghafouri-Fard
BACKGROUND: Robertsonian translocations are structural chromosomal abnormalities caused by fusion of two acrocentric chromosomes. In carriers of such translocations, different modes of segregations would result in the formation of either balanced (alternate segregation mode) or unbalanced (adjacent 1, adjacent 2, and 3:1 segregation modes) gametes. In addition, there is an increased risk for imprinting disorders in their offspring. Although it has been estimated that 1/1000 healthy persons carry a Robertsonian translocation, homozygosity for this type of structural chromosomal abnormality has been reported rarely...
July 2016: Journal of Reproduction & Infertility
Sheeba Marwah, Supriya Gupta, Neera Parothi Batra, Vidhu Bhasin, Veena Sarna, Nirlep Kaur
INTRODUCTION: Missed miscarriages, occurring in upto 15% of all clinically recognized pregnancies are a cause of concern for the patients. Though many researchers in the past have compared the surgical and medical approaches in management of such patients, only a few have executed an appraisal of two routes of misoprostol at equal dosages in treatment of first trimester missed miscarriages. AIM: To compare the efficacy of misoprostol by vaginal and oral route, for the management of first trimester missed abortion; and to recognize the utility of misoprostol for cervical dilation prior to any surgical termination of pregnancy...
May 2016: Journal of Clinical and Diagnostic Research: JCDR
Mohamed S Badr, Samar S Attia, Walid S El-Sherbiny, El Ebidi Abd-Allah M A, Hesham M Hefny, Ahmed N M Salem
Toxoplasmosis caused by Toxoplasma gondii is one of the most prevalent parasitic diseases in human beings. Human toxoplasmosis can be associated with serious clinical manifestations, particularly in developing fetus. The aim of the current study was to identify the possible lineage type of Toxoplasma gondii, molecularly detected in placental samples of women whose pregnancies were spontaneously terminated in the first trimester. Preliminary detection of Toxoplasma genomic materials was done by a SYBR green qPCR technology...
April 2016: Journal of the Egyptian Society of Parasitology
Marie Trkova, Martin Hynek, Lubica Dudakova, Vera Becvarova, Martin Hlozanek, Dagmar Raskova, Andrea L Vincent, Petra Liskova
We observed bilateral cataracts on second trimester ultrasound, in two consecutive pregnancies, with no other structural defects detected. The parents were unrelated and had no family history for the disease. The first pregnancy was terminated in week 22. Copy number variation analysis revealed, in both the aborted fetus and the mother, a 495 kb duplication at 22q11.23 encompassing CRYBB3 and CRYBB2, and not present in variation databases. In the second pregnancy, lens hyperechogenicity was detected by ultrasound at week 13 and 4 days...
July 2016: American Journal of Medical Genetics. Part A
Ahmed Namazov, Leonti Grin, Michael Volodarsky, Eyal Anteby, Ofer Gemer
STUDY OBJECTIVE: To show the possibility of laparoscopic management of uterine rupture. DESIGN: Video with explanations. SETTING: In the medical management with misoprostol for termination of pregnancy at any time the risk of uterine rupture may be possible. The risk is likely higher in women with a previous uterus surgery. In a systematic review of available studies, the risk of rupture was .28% among women with a prior cesarean delivery who were undergoing second-trimester misoprostol-induced abortion, meaning if 414 women with a history of cesarean delivery were given misoprostol for second-trimester abortion, 1 would experience uterine rupture...
September 2016: Journal of Minimally Invasive Gynecology
Ursula Winterfeld, Paul Merlob, David Baud, Valentin Rousson, Alice Panchaud, Laura E Rothuizen, Nathalie Bernard, Thierry Vial, Laura M Yates, Alessandra Pistelli, Maria Ellfolk, Georgios Eleftheriou, Loes C de Vries, Annie-Pierre Jonville-Bera, Mine Kadioglu, Jerome Biollaz, Thierry Buclin
OBJECTIVE: To investigate pregnancy outcomes following maternal use of pregabalin. METHODS: This multicenter, observational prospective cohort study compared pregnancy outcomes in women exposed to pregabalin with those of matched controls (not exposed to any medications known to be teratogenic or to any antiepileptic drugs). Teratology Information Services systematically collected data between 2004 and 2013. RESULTS: Data were collected from 164 exposed pregnancies and 656 controls...
June 14, 2016: Neurology
Bengt Källén, Margareta Reis
The article discusses possible effects of the use of analgesics during pregnancy. It summarizes the pertinent literature and reports some previously unpublished data from the Swedish Medical Birth Register. Most likely the use of analgesics does not cause spontaneous abortion. Only small malformation risk increases are seen after the use of opioids and perhaps non-steroid anti-inflammatory drug (NSAID) use. If possible, the latter should be avoided during the first trimester. If exposure has occurred there is no reason to consider an interruption of the pregnancy...
June 2016: Drugs
F Burada, S Sosoi, D Iliescu, M Ioana, D Cernea, S Tudorache
BACKGROUND: Trisomies are the most common chromosomal abnormalities, being a major cause of pregnancy loss in the first trimester. Data from preimplantation embryos support the concept of recurrent aneuploidy in women with recurrent abortion. CASE: The authors report a rare case with three different consecutive trisomic pregnancies: 47,XY,+21, 47,XX,+9, and 47,XX,+18. All pregnancies resulted from the same relationship and no consanguinity was present. Standard clinical cytogenetic analysis indicated that both members had normal peripheral blood karyotype, with no evidence of mosaicism in either patient or her partner...
2016: Clinical and Experimental Obstetrics & Gynecology
Hironori Takahashi, Yosuke Baba, Rie Usui, Akihide Ohkuchi, Shigeyoshi Kijima, Shigeki Matsubara
Post-delivery/-abortion uterine artery pseudoaneurysm (UAP) sometimes causes life-threatening bleeding, requiring transarterial embolization (TAE). It is unclear whether some UAP resolve spontaneously. In three patients, UAP resolved spontaneously without TAE. Case 1 was after vacuum delivery with slight bleeding: at day 5 post-partum, a yin-yang sign on Color Doppler and an enhanced intrauterine sac-like structure were observed, leading to the diagnosis of UAP, which disappeared at 4 weeks post-partum. Case 2 was after vacuum delivery with manual placental removal and was asymptomatic: a hypoechoic intrauterine mass with a yin-yang sign were observed during a post-partum routine check-up and the intrauterine flow disappeared at 4 weeks post-partum...
March 30, 2016: Journal of Obstetrics and Gynaecology Research
Frederick Schatz, Ozlem Guzeloglu-Kayisli, Sefa Arlier, Umit A Kayisli, Charles J Lockwood
BACKGROUND: Human pregnancy requires robust hemostasis to prevent hemorrhage during extravillous trophoblast (EVT) invasion of the decidualized endometrium, modification of spiral arteries and post-partum processes. However, decidual hemorrhage (abruption) can occur throughout pregnancy from poorly transformed spiral arteries, causing fetal death or spontaneous preterm birth (PTB), or it can promote the aberrant placentation observed in intrauterine growth restriction (IUGR) and pre-eclampsia; all leading causes of perinatal or maternal morbidity and mortality...
June 2016: Human Reproduction Update
Kalistyn H Lemke, Jingly F Weier, Heinz-Ulrich G Weier, Anna R Lawin-O'Brien
Human reproduction is a tightly controlled process of stepwise evolution with multiple, mostly yet unknown milestones and checkpoints. Healthy halpoid gametes have to be produced by the parents, which will fuse to form the diploid zygote that implants in the female uterus and grows to become first an embryo, then a fetus and finally matures into a newborn. There are several known risk factors that interfere with normal production of gametes, spermatocytes or oocytes, and often cause embryonic mortality and fetal demise at an early stage...
November 2015: Advanced Techniques in Biology & Medicine
Rebecca H Allen, Alisa B Goldberg
First-trimester surgical abortion is a common, safe procedure with a major complication rate of less than 1%. Cervical dilation before suction abortion is usually accomplished using tapered mechanical dilators. Risk factors for major complications in the first trimester include increasing gestational age and provider inexperience. Cervical priming before first-trimester surgical abortion has been studied using osmotic dilators and pharmacologic agents, most commonly misoprostol. Extensive data demonstrate that a variety of agents are safe and effective at causing preoperative cervical softening and dilation; however, given the small absolute risk of complications, the benefit of routine use of misoprostol or osmotic dilators in first-trimester surgical abortion is unclear...
April 2016: Contraception
A K Yadav, H Chaudhari, P K Shah, T Madan
Dysregulation of immune response at the feto-maternal interface during first trimester of pregnancy is one of the leading causes of spontaneous abortion. Previously, we reported differential expression of collectins, soluble pattern recognition molecules involved in immunoregulation, in placental and decidual tissues during spontaneous labor. In the present pilot study, the expression of collectins was analyzed in the inflamed human gestational tissues of spontaneous abortion ('SA') and in 13.5 dpc placental tissues from resorption survived embryos of murine model (CBA/J X DBA/2J)...
February 2016: Immunobiology
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